Obroythil ore can be mined for Obroythil Dust which can be combined with 6 Blocks of Obroythil, 2 nether stars, and 1 extracted soul (brew soul sand in a brewing stand) to create 16 Amplified Obroythil Dust. This dust can be combined with netherite ingots in a smithing table to create Obroythil/Netherite Alloy Ingots and combined again with netherite tools and gear for an upgrade.